Aggregation-Induced Emission Luminogens (AIEgens) for Non-Doped Organic Light-Emitting Diodes

Organic light-emitting diodes (OLEDs) have shown great potential in full-color flat panel displays and solid-state white lighting. For the fabrication of high-performance OLEDs, the light-emitting materials are of high importance. However, most conventional luminescent materials generally suffer from aggregation-caused quenching (ACQ) problem, which weakens the fluorescence of their solid films, and thus, undermines OLED performance. Recently, a new kind of luminogens with aggregation-induced emission characteristics (AIEgens) is found to be free of ACQ problem. They can fluoresce strongly in solid films and perform outstandingly in non-doped OLEDs. Herein, representative AIEgens with fluorescence color covering from blue to red and varied carrier transport ability for the application in efficient non-doped OLEDs are described.